Se favoreció con ello los cimientos científicos de la profesión de Trabajo Social y una sociedad más participativa e igualitaria, donde los cambios se realizaron desde la comunidad para la comunidad. [ABSTRACT]Their toil was executed from a creative basis with the intention to work on the empowerment of the persons from an individual as well as from a community level, through the promotion of competencies on people, groups and communities. With the objective to achieve a leading role for them, starling from the premise that people have resources, knowledge and experience considered as the main key for their empowerment. Resulting this way in great social reforms thanks to which children's and women's rights have been acknowledged, in addition to achieving improvements over labour conditions, minor's education and family care. The scientific foundations of Social Work profession and, additionally, the construction of a society more participative and egalitarian were favored with their work, and as a matter of fact, the changes were made from the community for the community.